DA9211 datasheet(71/74 Pages) DIALOG

71 / 74 page

DA9211 and DA9212

Datasheet

Company confidential

Data sheet

Version <3.0>

<07-Jan-2015>

CFR0011-120-00 Rev 3

71 of 74

15. Application Information

The following recommended components are examples selected from requirements of a typical

application.

Capacitor Selection

15.1

Ceramic capacitors are used as bypass capacitors at all VDD and output rails. When selecting a

capacitor, especially for types with high capacitance at smallest physical dimension, the DC bias

characteristic has to be taken into account.

Table 17: Recommended capacitor types

Application

Value

Size

Temp Char

Tol

V-Rate

Type

VOUT

output

bypass

4x 22 µF

0402

X5R +/-15%

+/-20%

4 V

Semco

CL05A226MR5NZNC

4x 10 µF

0402

X5R +/-15%

+/-20%

10 V

Semco

CL05A106MP5NUNC

VDDx

bypass

4x 10 µF

0603

X5R +/-15%

+/-20%

6.3 V

Murata

GRM188R60J106ME84

VSYS

bypass

1x 1 µF

0402

X5R +/-15%

+/-10%

10 V

Murata

GRM155R61A105KE15#

VDDIO

bypass

100 nF

01005

X5R +/-15%

±10%

6.3 V

Semco

CL02A104KQ2NNN

Inductor Selection

15.2

Inductors should be selected based upon the following parameters:

● Rated max. current: usually a coil provides two current limits: The Isat specifies the maximum

current at which the inductance drops by 30% of the nominal value. The Imax is defined by the

maximum power dissipation and is applied to the effective current.

● DC resistance: critical for the converter efficiency and should therefore be minimised.

● Inductance: given by converter electrical characteristics; 0.47uH for each DA9211 and DA9212

phase.

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